To investigate the load-bearing capacity and failure modes of unidirectional fiber-reinforced lami-nates subjected to uniaxial loads,finite element analyses were conducted to predict mechanical responses such as plastic accumulation and damage evolution.The Ladeveze constitutive model based on the 2D continuum damage theory was introduced and a user material subroutine was developed based on this model to consider the plastic behavior of the composites,where the isotropic plastic strengthening was assumed.Subsequently,a LS-DYNA finite element simulation model for unidirectional laminate plates was established to explore typical failure behaviors under loading conditions of longitudinal tension,longitudinal compression,transverse ten-sion,and in-plane shear,respectively.A comparative analysis with experimental results was carried out to vali-date the efficacy of the developed subroutine.Finally,a logarithmic rate-dependent correction function was in-troduced to predict the damage modes of composite materials under various strain rate loads.The sensitivity of the rate effect in unidirectional fiber-reinforced laminates and its correlation with load-bearing components were investigated.
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